Drill-press.



No. 863,137. PATENTED AUG. 13, 1907. W. J..BAYRER.

DRILL PRESS.

APPLICATION FILED APE.9, 190a.

3 SHEETS-SHEET 1.

THE NORRIS PETERS C0,. WASHINGTON. A c

PATENTED AUG. 13, 1907.

W. J. BAYRER.

DRILL PRESS.

1 APPLIUATION FILED APR.9, 1906.

3 SHEETS-SHEET. 3,

UNITED STATES PATENT entree.

WILLIAM J. BAYRER, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE HENRY &WRIGHT MANUFACTURING COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OFCON- N ECTICUT.

DRILL-PRESS Specification of Letters Patent.

Patented Aug. 13, 1907.

Application filed April 9, 1906. Serial No. 310,693.

To all whom it may concern:

Be it known that I, WILLIAM J. Barman a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented a new and useful Drill-Press, of which thefollowing is a specification.

This invention relates to the construction and arrangement of thesupporting parts and driving mechanisms of the vertically movablespindle of a drill press.

The object of the invention is to provide such an organization which ischeap to manufacture, has comparatively few parts and is simple toassemble and easy to adjust at any time, and which is so designed thatthe spindle will rotate without wabbling or vibrating and with a verysmall amount of friction, whereby the spindle may be run very slowlywith great power, or run at very high speed and while having a widerange will accomplish accurate and efiicient work at all times.

This invention may be embodied in a drill press head in which thespindle is arranged to be driven directly at high speed or indirectlythrough back-gearing at low speed, and in a head in which the spindle isdriven directly at various speeds without the intervention ofback-gears.

In carrying out this invention the driving mechanisms and the spindlesupporting parts are so arranged in the head that there'is no rotaryfriction between the vertically movable spindle and its immediatesupport, and all of the bearings which are anti-friction are adj ustedby the movement of one easily manipulated part which is located in avery accessible position below the head.

Figure 1 of the accompanying drawings shows a side elevation of thespindle head of a drill press provided with back-gearing, that embodiesthe invention. Fig. 2 shows on larger scale a central vertical sectionof the spindle supporting and driving parts of the same form of theinvention. Fig. 3 shows a plan of the connec tion between the rotatorydriving member and the spindle. Fig. 4 shows a central vertical sectionof a spindle head with a simple direct drive, that embodies theinvention. Fig. 5 shows a plan of the small step of the cone pulleyshown in Fig. 4 and the contained spindle drive.

The frame head 1 has a vertical opening and in recesses at the upper andlower ends of the opening are oppositelyfacing ball cases 2 containingbearing balls 3.

In the form of the invention first shown extending through the openingin the head and the ball cases is the tubular hub 4 of a gear 5. On thishub are ball cones 6 that engage the balls in the cases in the head.

The spindle 7 extends through this gear and its tubular hub and is freeto move up and down therein but is keyed so as to rotate with the gearand hub by the rolls 8 which are supported in recesses in the gear andextend into longitudinal grooves in the spindle. This connection betweenthe driving member and the spindle may be made by angular blocks 9 asshown in Fig. 4, it desired. These rolls or blocks permit the spindle tobe moved up and down freely but require it to rotate with the gear andits hub.

Mounted on the gear is a cap 10 which incloses the driving rolls. Thiscap has a hub 11 which extends upwardly through an opening in the arm 12that is bolted to the top of the drill press frame.

Loosely supported in the opening in the arm is a ball-race 13 containingballs 14 and on the hub of the cap are oppositely facing cones 1.5 whichare adjusted by the nut 16 that turns on the threaded upper end of thecap hub. The front end of the arm is preferably split and provided witha clamp screw 17 for binding the ball-race after it has been adjusted.

Surrounding the hub of the gear above the head is a pinion 18 having ahub 19 on which is secured a pulley 20. At the ends of the pinion hubare oppositely facing ball cases 21 containing balls 22 and on the hubof the gear adjacent to these are cones 23.

The pulley has a clutch pin 24 which may be thrust into or pulled out ofa socket in the gear, a springcatch 25 being provided for holding thepin in the desired position.

The lower end of the tubular hub of the gear is threaded and screwedupon this is a cone pulley 26 which has a split hub and screws 27 thatmay be tightened for clamping the pulley in position after it has beenturned to the desired location. The hub of this pulley bears against theunderside of the cone on the gear hub that is beneath the head and theadjustment of all of the anti-friction bearings depends on the locationof this pulley.

Instead of having the bearings adjusted by means of the pulley below thehead, a nut 28 may be screwed upon the lower end of the hub against thelowest ball cone, which nut may be split and provided with a clamp screw29, as shown in Fig. 4.

In assembling the parts the pulley and the pinion which are securedtogether are mounted on the hub of the gear and then the hub of the gearis mounted in the head, after which the arm which supports the gear capis secured in place on the top of the frame. The

pulley or a nut, as the casemay be, below the head is then screwed uponthe hub of the gear. Tightening or loosening this pulley or nut adjustsall of the anti-friction bearings. After the pulley or nut has been adjusted to the proper position it is clamped in position and the arm istightened on the top ball-race. These parts are always accessible foradjusting the bearings so that wear can be taken up at any time. Theballrace that is supported by the arm at the top moves up and down inthe opening in the arm as the other parts are adjusted. This bearingmerely acts as a support for the upper end of the spindle and preventsit from wabbling when it is raised. The spindle slides freely up anddown through the hub of the gear and the hub of the gear cap. Theseparts do not rotate relatively to each other so that there is norotatory friction between them. The only rotatory friction that there isis that between the balls and ball-cases and cones which support the hubof the gear.

Meshing with the driving gear is a back pinion 30 which is fastened to asleeve 31 to which is fastened a back gear 32 that meshes with thedriving pinion on the hub of the spindle gear. The back pinion and gearare mounted on an eccentric shaft so that they may be thrown into andout of mesh with the driving gear and pinion, as required.

\Vhen it is desired to rotate the spindle at high speed the pulley isfastened to the gear by the clutch pin and the back pinion and gear aredisengaged. Under these circumstances the spindle is driven directly atthe speed of the pulley. When it is desired to rotate the spindle slowlythe back pinion and gear are brought into mesh with the driving gear andpinion and the clutch pin is drawn out so that the pulley is free fromthe driving gear. Then the rotation of the pulley rotates the drivingpulley indirectly through its pinion and the back-gearing.

If the back gears are not required the parts may be arranged as shown inFig. 4. In this form of the invention the supporting sleeve 33 may bemade a part of the hub of the cone pulley 34 and the spindle drive maybe arranged inside of the upper step of this pulley. This form ofmechanism is very simple and it will be noted that there is no rotaryfriction between the spindle and its support, all of the rotary frictionbeing taken by the ball bearings at the upper and lower ends of theopening through the head and these bearings are comparatively large indiameter and are quite a distance apart so that the friction is verysmall and there is no chance for the spindle to wabble or vibrate. Thesebearings are quickly adjusted by simply turning the nut at the lower endof the head which is accessible at all times.

The invention claimed is 1. The combination with a drill press headhaving a ver tlcal opening therethrough, of a driving member above thehead, a tubular hub extending from the driving member and much smallerin diameter than the opening in the head through which it extends, ballbearings at the upper and lower ends of the opening through the headinterposed between the head and the hub and holding the hub fromvertical also horizontal movement, a driving; member attached to the hubbelow the head and adapted by its location to adjust the ball bearings,a drill spindle extending vertically through the hub, and a spindledrive carried by the first mentioned driving member above the head andconnecting the said driving member and the spindle so the latter will berotated by the former but may be independ ently reciprocated through theformer, substantially as specified.

2'. The combination with a drill press of a driving member, a hub fixedto said driving member and extending through the head, bearings carriedby the head and supporting the hub, a driving member mounted on the hubof said first mentioned driving member, means detachably connecting thesaid driving members, a spindle extending through the hub, a spindledrive carried by the first mentioned driving member for causing thespindle to rotate with the driving member but allowing it to beindependently reciprocate-d through the driving member, substantially asspecified.

3. The combination with a drill press head of a driving member, a hubfixed to said driving member and extending through the head, bearingscarried by the head and supporting the hub, a driving member mounted onthe hub of said first mentioned driving member, means detachablyconnecting the said driving members, a spindle extending through thehub, a spindle drive carried by the first mentioned driving member forcausing the spindle to rotate with the driving member but allowing it tobe independently recipl'ocated through the driving member, a capinclosing the spindle drive and having a hub arranged to support theupper end of the spindle, and bearings mounted in the frame forsupporting the hub of the cap, substantially as specified.

:4. The combination with a drill press head of a gear having a hub thatextends through an opening in the head, bearings at the upper and lowerends of the opening through the head and supporting the hub, avertically movable spindle extending through the gear and its hub. meanscarried by the gear for causing the spindle to rotate with it, a pulleyand a pinion mounted upon the hub of the gear, means for connecting thepulley, with the gear, and back gearing arranged to connect the drivinggear and pinion, substantially as specified.

WILLIAM J. BAYRER.

Witnesses ETHEL M. Lown, HARRY R. \VILLIAMS.

